Kier, P. M. 1972. Tertiary and Mesozoic Echinoids of Saudi Arabia. Smithsonian Contributions to Paleobiology 10, 1-105., available online athttps://doi.org/10.5479/si.00810266.10.1 page(s): 97-98; pl. 64: figs 1-8, pl. 65: figs 1-2 [details]
Kroh, A.; Mooi, R. (2021). World Echinoidea Database. Agassizia (Agassizia) powersi Kier, 1972a †. Accessed through: Marine Species Traits editorial board (2021) Marine Species Traits at: http://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1034370 on 2025-05-13
Marine Species Traits editorial board (2025). Marine Species Traits. Agassizia (Agassizia) powersi Kier, 1972a †. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1034370 on 2025-05-13
original descriptionKier, P. M. 1972. Tertiary and Mesozoic Echinoids of Saudi Arabia. Smithsonian Contributions to Paleobiology 10, 1-105., available online athttps://doi.org/10.5479/si.00810266.10.1 page(s): 97-98; pl. 64: figs 1-8, pl. 65: figs 1-2 [details]